| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a clock generating circuit for executing frequency modulation capable of carrying out intended frequency modulation. <P>SOLUTION: The clock generating circuit includes: a phase comparator for receiving a reference clock and a feedback clock; a current controlled oscillator for generating an operating clock on the basis of an output of the phase comparator; a frequency divider circuit for dividing the operating clock at a frequency division rate on the basis of a frequency division rate setting signal to obtain the feedback clock; and a control circuit that counts the number of the operating clocks and outputs a control current setting signal for setting a control current of the current controlled oscillator and the frequency division rate setting signal on the basis of a result of the count. <P>COPYRIGHT: (C)2007,JPO&INPIT |
